Constructor

new QuadTree(x, y, width, height, maxObjects, maxLevels, level)

A QuadTree implementation. The original code was a conversion of the Java code posted to GameDevTuts.
However I've tweaked it massively to add node indexing, removed lots of temp. var creation and significantly increased performance as a result.
Original version at https://github.com/timohausmann/quadtree-js/